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# Copyright (C) 2006 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Benchmark test suite for bzr."""
from bzrlib import (
bzrdir,
plugin,
)
import bzrlib.branch
from bzrlib.tests.TestUtil import TestLoader
from bzrlib.tests.blackbox import ExternalBase
class Benchmark(ExternalBase):
"""A Test class which provides helpers for writing benchmark tests."""
def make_kernel_like_tree(self, url=None, root='.',
link_working=False):
"""Setup a temporary tree roughly like a kernel tree.
:param url: Creat the kernel like tree as a lightweight checkout
of a new branch created at url.
:param root: Path where the tree will be created.
:param link_working: instead of creating a new copy of all files
just hardlink the working tree. Tests must request this, because
they must break links if they want to change the files
:return: A newly created tree.
"""
from bzrlib.benchmarks.tree_creator.kernel_like import (
KernelLikeTreeCreator,
)
creator = KernelLikeTreeCreator(self, link_working=link_working,
url=url)
return creator.create(root=root)
def make_kernel_like_added_tree(self, root='.',
link_working=True,
hot_cache=True):
"""Make a kernel like tree, with all files added
:param root: Where to create the files
:param link_working: Instead of copying all of the working tree
files, just hardlink them to the cached files. Tests can unlink
files that they will change.
:param hot_cache: Run through the newly created tree and make sure
the stat-cache is correct. The old way of creating a freshly
added tree always had a hot cache.
"""
from bzrlib.benchmarks.tree_creator.kernel_like import (
KernelLikeAddedTreeCreator,
)
creator = KernelLikeAddedTreeCreator(self, link_working=link_working,
hot_cache=hot_cache)
return creator.create(root=root)
def make_kernel_like_committed_tree(self, root='.',
link_working=True,
link_bzr=False,
hot_cache=True):
"""Make a kernel like tree, with all files added and committed
:param root: Where to create the files
:param link_working: Instead of copying all of the working tree
files, just hardlink them to the cached files. Tests can unlink
files that they will change.
:param link_bzr: Hardlink the .bzr directory. For readonly
operations this is safe, and shaves off a lot of setup time
"""
from bzrlib.benchmarks.tree_creator.kernel_like import (
KernelLikeCommittedTreeCreator,
)
creator = KernelLikeCommittedTreeCreator(self,
link_working=link_working,
link_bzr=link_bzr,
hot_cache=hot_cache)
return creator.create(root=root)
def make_kernel_like_inventory(self):
"""Create an inventory with the properties of a kernel-like tree
This should be equivalent to a committed kernel like tree, not
just a working tree.
"""
from bzrlib.benchmarks.tree_creator.kernel_like import (
KernelLikeInventoryCreator,
)
creator = KernelLikeInventoryCreator(self)
return creator.create()
def make_many_commit_tree(self, directory_name='.',
hardlink=False):
"""Create a tree with many commits.
No file changes are included. Not hardlinking the working tree,
because there are no working tree files.
"""
from bzrlib.benchmarks.tree_creator.simple_many_commit import (
SimpleManyCommitTreeCreator,
)
creator = SimpleManyCommitTreeCreator(self, link_bzr=hardlink)
return creator.create(root=directory_name)
def make_heavily_merged_tree(self, directory_name='.',
hardlink=False):
"""Create a tree in which almost every commit is a merge.
No file changes are included. This produces two trees,
one of which is returned. Except for the first commit, every
commit in its revision-history is a merge another commit in the other
tree. Not hardlinking the working tree, because there are no working
tree files.
"""
from bzrlib.benchmarks.tree_creator.heavily_merged import (
HeavilyMergedTreeCreator,
)
creator = HeavilyMergedTreeCreator(self, link_bzr=hardlink)
return creator.create(root=directory_name)
def create_with_commits(self, num_files, num_commits, directory_name='.',
hardlink=False):
"""Create a tree with many files and many commits. Every commit changes
exactly one file.
:param num_files: number of files to be created
:param num_commits: number of commits in the newly created tree
"""
from bzrlib.benchmarks.tree_creator.many_commit import (
ManyCommitTreeCreator,
)
creator = ManyCommitTreeCreator(self, link_bzr=hardlink,
num_files=num_files,
num_commits=num_commits)
tree = creator.create(root=directory_name)
files = ["%s/%s" % (directory_name, fn) for fn in creator.files]
return tree, files
def commit_some_revisions(self, tree, files, num_commits,
changes_per_commit):
"""Commit a specified number of revisions to some files in a tree,
makeing a specified number of changes per commit.
:param tree: The tree in which the changes happen.
:param files: The list of files where changes should occur.
:param num_commits: The number of commits
:param changes_per_commit: The number of files that are touched in
each commit.
"""
for j in range(num_commits):
for i in range(changes_per_commit):
fn = files[(i + j) % changes_per_commit]
content = range(i) + [i, i, i, '']
f = open(fn, "w")
try:
f.write("\n".join([str(k) for k in content]))
finally:
f.close()
tree.commit("new revision")
def test_suite():
"""Build and return a TestSuite which contains benchmark tests only."""
testmod_names = [ \
'bzrlib.benchmarks.bench_add',
'bzrlib.benchmarks.bench_bench',
'bzrlib.benchmarks.bench_bundle',
'bzrlib.benchmarks.bench_cache_utf8',
'bzrlib.benchmarks.bench_checkout',
'bzrlib.benchmarks.bench_commit',
'bzrlib.benchmarks.bench_dirstate',
'bzrlib.benchmarks.bench_info',
'bzrlib.benchmarks.bench_inventory',
'bzrlib.benchmarks.bench_knit',
'bzrlib.benchmarks.bench_log',
'bzrlib.benchmarks.bench_osutils',
'bzrlib.benchmarks.bench_rocks',
'bzrlib.benchmarks.bench_startup',
'bzrlib.benchmarks.bench_status',
'bzrlib.benchmarks.bench_transform',
'bzrlib.benchmarks.bench_workingtree',
'bzrlib.benchmarks.bench_sftp',
'bzrlib.benchmarks.bench_xml',
]
suite = TestLoader().loadTestsFromModuleNames(testmod_names)
# Load any benchmarks from plugins
for name, module in plugin.all_plugins().items():
if getattr(module, 'bench_suite', None) is not None:
suite.addTest(module.bench_suite())
return suite
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